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Patented July 5, |898.

W. DUUGHERTY.

BOILER CLEANER AND FILTER.

(Application filed June 307 1897.)

{No Model.)

UNITED Srarns .'PiArnNfr Ormea.,

VILLAM DOUGHERTY, CHESTER, PENNSYLVANIA, ASSIGNOR OF ONE- THIRD TO CROSBY M. BLACK, OF SAME PLACE.

BOILER-CLEANER AND FILTER.

Y SPECIFICATION forming part of Letters Patent No, 67,004, dated July 5, 1898. Application filed .Tune 30,1897. Serial No. 642,964. (No model.)

T0 all whom/Kit -may concerns Be it known that I, WILLInII DoUeHnRrv, a citizen of the United States, residing at Chester, in the countyof Delaware and,- State of Pennsylvania, have invented certain new and useful Improvements in-Boiler-Cleaners and Filters; and ido ldeclare theffollowingto be a full, clear, and exact description ofd the invention, such aswill enable others skilled in the art to,Whichitappertains to makeand use the same, reference beinghad to the accompanying drawings, and to the figures of reference marked thereon, which form a part of this specilication.

My invention relates to boiler-cleaners andmeet'in opposing-sprays, thereby breaking' the water intoA minute globules and violently agitating it beforereaching the comparative calm of the settling-chamber,- froin which, it is served through a suitable filter by gravity to the boiler. -5

I accomplish the object stated by employ-l ing a cylindricaL shell supported higher than. the boiler and introducing inthe upper'por-j Y tion of the shell perforated pipesarranged to Spray live steam and feed-water oppositely, the lower part of the shell constituting the settling-chamber. There are also provided adequate boiler and other connections, scum and mud blowod pipes,watergage,andvalves to govern the fluid distribution as desired.

throughout the several views, Figure 1 represents a side View, the shell of my invention and that of the boiler being in vertical section. All of the piping,'with valves and connections, is shown, part being in section to exhibit the operative difference `between the check-valves.A F.ig.'2.represents a plan view of lone of the similar spray-heads, and Fig. 3 shows a modified form of the spraying devices in vertical section. l Considering Fig. 1,numeral 1 marks the boiler-skin, 2 the iiues', and 3 the dome. Raised somewhat above the boiler is a properly-supported brickwork covering 4f, which forms the top of a return-passage 5 immediately over the boilerfleading at the right in to a'stack or uptake in the common manner. The arrows indicate the path of heated products of combustion. l y

Numeral 6 designatesthe` shell of my invention. As hereinbcfore stated and as shown in Fig. 1, shell 6 is suitably supported somewhat higher than the boiler l. From dome 3 extends pipe 7, usually provided with cut-off valve S and terminating in a T 9, coupled to branch pipes 10 and 11, the former in Fig. 3. Under certain circumstancesl may omit diaphragm 1l within the purview of my invention. After leaving the shell pipe 16 is provided with a cut-off valve 17 and checkvalve 18, opening inwardly. Steam or Water passing check-valve 18 cannot, therefore, return. As ordinarily constructed pipe 16 is given one or more turns longitudinally in the psasage 5 above the boiler, enabling it to act as a feed-water heater. I do not, however, con'- fine myself to this arrangement, as any efcient heater may be introduced. From passage 5 pipe 16 is led to the pumps. p Atsome IOO point before pipe 16 finally leaves passage 5 it is interrupted by a T, from which arises pipe 1t?, having check-valve 20,0pening downwardly, as shown. Pipe 19 enters the bottom of shell 6 and terminates in a curved portion bent downwardly, in order that falling impurities may not be again introduced into the feed-water by t-he intermittent circulatory action to be explained later. That portion of pipe 19 within shell 6 stands wholly in the settling-chamber part of my invention,and hence its mouth must be guarded from descending solid matter, as stated.

There are two discharge-pipes leading from shell 6, one, 21, opening centrally through the bottom and possessing' valve 22, the other,

23, passing into the shell at a distance above the bottom predetermined as the desired depth of water in the settling-chamber and ending in a perforated pipe or skimmer 24C, the office of which is to collect the surface scum from the settling-chamber. Pipe 23 is furnished with valve 25. Pipe 21 blows off the deposit of solid particles and joins with pipe 23 in a common outlet-pipe 2G below.

Numeral 27 marks a box, closed at the top, supported within shell 6 and extending somewhat above the surface of the body of settling water. A perforated bottom 28 is given the box and a filtering plate or stratum 26 :rests upon the inner surface thereof. The diverging mouthpiece of the boiler feed-pipe 30 is situated within box 27 upon a level with perforated pipe 24E, and it is my practice t0 cover the mouth of pipe 30 with an openended bell 3l, suspended within the box and having slotted walls, as shown, although the bell is not essential. Boiler feed-pipe 30 passes out through the bottom of shell 6 and into the boiler proper, terminating in a perforated portion 32, as commonly made.

A suitable water-gage (not shown) is usually attached to shell 6.

Assume the boiler to be steaming and the settling-chamber' to be filled by the pump through the heaterand pipe 16 until the water rises above the mouth of pipe 30. The pressure being equal throughout by reason of the dome connection the water will pass by gravity through pipe 30 into the boiler. Let the pump be stopped. There is now no longer a mechanically forced circulation through the heater portion of pipe 16. As soon, however, as the water in the vertical portion of pipe 16 is so far expanded or vaporized as to render it lighter than the column of water, bulk for bulk, in pipe 19 the water in the latter descends through check-valve 20. A sort of intermittent circulation is thus set up which is found to be perfectly protective of those portions of pipe 16 subjected to direct heat in passage 5.

In practice it is my custom to attach box 27 to one side of shell 6 and to provide a handhole 33, affording manual access to the box for the arrangement and renewal of the filtering stratum. The opening in the side of the filter chamber or box 27 is larger than the h-and-hole plate,which is thus brought directly against the interior of shell 6 or in contact with a seat prepared for it and attached in the usual manner. A second h and-hole 34 in the bottom of the shell permits the removal of matter deposited in the settling-chamber which may not be ejected through blow-ofi' pipe 21. It is usual also in setting up my invention to run a steam-pipe 35 from the dome or in any convenient manner connecting it with feed-water pipe 16 near shell 6, as shown, and providing a cut-off valve 36. The office of pipe 35 is to transmit steam to spray-head 15 for the purpose of elearingout its perforations periodically. Either of the blow-off pipes 21 23 may be employed as an outlet during this operation, if required.

I am aware that boiler-cleaners of this character, in which the feed-water, heated by steam, is caused to throw down its solids, have been constructed, and I do not claim that feature broadly.

Having thus described my invention,what I claim, and desire to protect by Letters Patent of the United States, is

1. In a boiler-cleaner and filter, the combination of a shell, a feed-water pipe entering the upper portion of the shell and terminating in a spray-head, a steam-pipe, upper and lowerbranch pipes connected with said steampipe, said branch pipes entering said shell and terminating in spray-heads one above and one below the spray-head of said feed-water pipe, the spray-heads oi' said branch pipes arranged to discharge toward each other, a scum-blow-oif pipe, a bottom blow-off pipe, a box supported within said shell and having a perforated bottom, a filter situated within said box, aud a boiler feed-pipe having its mouth within said box, said piping provided with suitable valves, substantially as described.

2. In a boiler-cleaner and filter, the combination of a shell, a feed-water pipe entering the upper portion of the shell and terminating in a spray-head, a steam-pipe, upper and lowerbranch pipes connected with said steampipe, said upper branch pipe entering the upper portion of said shell and terminating in a spray-head, said spray-heads arranged to discharge toward each other, a perforated diaphragm secured beneath said spray-heads, said lower branch pipe entering said shell and terminating in a spray-head arranged below and adapted to discharge toward said diaphragm, a scum-blow-off pipe, a bottom blowoff pipe, abox supported within said shell and having a perforated bottom, a filter situated within said box, and a boiler feed-pipe having its mouth within said box, said piping provided with suitable valves, substantially as described.

3. In a boiler-cleaner and filter, the combination of a shell, a feed-water pipe entering the upper portion of the shell and terminating in a spray-head, a steam-pipe connected IOO IIO

with said feed-water pipe, a steam-pipe having upper and lower branches, said upper branch pipe entering the upper portion of said shell and terminating in a spray-head,

said spray-heads arranged to discharge toward each other, a perforated diaphragm secured beneath said spray-heads, said lower branch pipe entering said shell and terminating in a sprayhead arranged below and adapted to discharge toward said diaphragm, a scum-blow-off pipe, a bottom blow-0E pipe, a box supported within said shell and having a perforated bottom, a filter situated within said box, hand-holes affording access to said box and shell, and a boiler feed-pipe having its mouth within said box, said piping provided with suitable valves, substantially as described.

4. A boiler-cleaner, consisting in the combination of a feed-water heater having an inlet-pipe adapted for connection with a pump or feed-Water source, a shell supported higher than said feed-water heater, a pipe connected with the outlet of said heater and terminating withinthe upper portion of said shell, a circulation-pipe connected With the inlet-pipe of said feed-Water heater and terminating Within the lower portion or" said shell, said circulation-pipe having a check-valve opening from said shell, a boiler feed-pipe terminating within the lower portion of said shell, the mouth of said boiler feed-pipe opening within the shell above the level of the mouth of said circulation-pipe and below the mouth of the pipe from the heater-outlet, said shell provided with blow-off pipes, substantially as described.

5. Aboiler-cleaner, having in combination with a boiler, a feed-water heater, a shell supported higher than said boiler and feedwater heater, a feed-water pipe connected with the outlet of said heater and entering the upper portion of said shell, said feedwater pipe possessing a check-valve opening toward the shell, a circulation-pipe entering the lower portion of said shell and having a check-valve opening from said shell, said circulation-pipe connected near the inlet of said feed-water heater, a steam-pipe connected with said boiler and entering the upper portion of said shell, a boiler feed-pipe entering the lower portion of said shell and passing into said boiler, said shellQ provided with pipes arranged to discharge scum and deposited matter, the piping having suitable cutoff valves, substantially as described.

6. A boiler-cleaner, having in combination with a boiler, a feed-water heater, a shell supported higher than said boiler and feedwater heater, a feed-water pipe connected with the outlet of said heater and entering the vupper portion of said shell, said feedwater pipe possessing a check-valve opening toward the shell, a circulation-pipe entering the lower portion of said shell and having a check-valve opening from said shell, the mouth of said circulation-pipe within said shell opening downwardly, said circulationpipe connected near the inlet of said feedwater heater, a steam-pipe connected with said boiler and entering the upper portion of said shell, a box supported within said shell and having a perforated bottom, a iilter situated within said box, a boiler feed-pipe entering said shell and box and opening above said iltcr, said feed-pipe passing into said boiler, said shell provided with pipes arranged to discharge scum and deposited matter, the piping having suitable cut-off valves, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

VILLIAM DO UGHERTY. lVitnesses:

THOMAS H. BERRY, Louis MEETH. 

